Phase Directional Overcurrent Relay with 90-degree connection when considering only relays at Phase A, which quantity is Operating and which quantity is Polarizing respectively
A. current phase A as Operating and the voltage between phase B-C is Polarizing
B. current phase A as Operating and the sum of the voltage vector between the B-C phase and the A-C phase is Polarizing
C. current phase A to Operating and the voltage between Phase A-B is Polarizing
D. current phase A to Operating and the sum of the voltage vector between phase A-B and phase A-C is Polarizing
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